Grandpa was ill. He was lying on the bed all day. He looked haggard and frowned. Originally smooth and round face suddenly added a lot of wrinkles, black and shiny hair also lost the luster of the past, a few strands of white hair quietly climbed to the top of the head.
在我上学的日子里,幸好还有小猫陪在他身边,带给他一些快乐。希望爷爷早日好起来,继续和我一起幸福地生活。
In my school days, fortunately, there are also kittens around him to bring him some happiness. I hope Grandpa will get better soon and continue to live happily with me.
1、结合具体情境,学习名数的改写。
2、应用知识的迁移,学会单名数和复名数之间的改写。
3、培养学生探求知识的兴趣,提高合作探索知识的能力。
Yesterday, our class had a discussion about whether junior students could ride electric bicycles to go to school. 25 students of our class agreed with it, because they said that it is convenient for them and it could take less time to go to school. If they took bus, sometimes the bus come late and it might make them late for school. But the other 35 students didn't agree with them. They said it is not safe for the junior students to get to school by electric bicycles, for they are too young. They also said in the morning the traffic was very busy and the students couldn't ride electric bicycles quickly. Besides, there are too much electric bicycles in the street now, they can get hurt easily.
昨天,我们班讨论了关于中学生是否该骑电单车上学的问题。班上25位同学表示赞同,因为他们认为这样比较方便而且更省时。如果他们坐公车,有时候公车来得晚就有可能使他们迟到。但是,另外的\'35位同学不同意他们的看法。他们认为中学生骑电单车上学是不安全的,因为他们还太小了。他们还认为早上交通繁忙,学生骑车不能太快。而且,现在路上的电单车太多了,他们很容易受伤。
1.重视数学教学与生活的联系
数学教学要让学生学习有价值的数学和必需的数学,就必须联系学生生活,使学生感到数学与生活密不可分,数学是生动的、有趣的,而不是单调的、枯燥的。本节课从开始导入天鹅长大后比出生时体重增加了多少?到后来的练习,都把数学和日常生活联系在一起。对激发学生学数学的积极性和学好、用好数学的自信心都起到了推波助澜的作用。
2.注重学生的自主探究活动
本节课教师通过安排学生自主合作、探究的学习过程,向学生提供了充分从事数学活动的机会,激发了学生学习的积极性。不仅使学生真正理解和掌握了数学知识和技能,数学思想和方法,而且使学生获得广泛的数学活动,营造了民主、平等、宽松、和谐的学习气氛。
谈话:前面我们了解到《吉尼斯世界纪录大全》中的蔬菜之最,最大的葫芦周长是1.77米,最重的南瓜重0.607吨。
1.77米=( )厘米、0.607吨=( )千克
(学生回答。)
谈话:你是怎样换算的?
请多名学生回答。
最重的芹菜重23千克800克;最长的胡萝卜3.35米。
(课件出示图片和数据)
[设计意图]采用学生前面了解到的知识创设情境,不仅可以激发学生的学习兴趣,而且可以使学生感到数学知识在生活中的广泛应用和本单元知识的连贯性和系统性,利于学生的.系统思考。同时,对学生单名数换算进行了复习,为下面的探究奠定了基础。
1.教学设计连贯,思路敏捷。
2.教学评价及时且有针对性。
1.结合具体情境,学习名数的改写。
2.应用知识的迁移,学会单名数和复名数之间的改写。
3.培养学生探求知识的兴趣,提高合作探索知识的能力。
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